A 550 kg elevator starts from rest. It moves upward for 5.00 s with constant acceleration until it reaches its cruising speed, 1.75 m/s.
(a) What is the average power of the elevator motor during this period?
W
(b) How does this power compare with the motor power when the elevator moves at its cruising speed?
Pcruising = W


The formula for average power is avg. power = work/change in time
However, I am not sure how to find the work in the problem since no force or angle is given... Is gravity the only force doing work and is the angle 90?